Identification of membrane spanning beta strands in bacterial porins
نویسندگان
چکیده
منابع مشابه
TMBETA-NET: discrimination and prediction of membrane spanning β-strands in outer membrane proteins
We have developed a web-server, TMBETA-NET for discriminating outer membrane proteins and predicting their membrane spanning beta-strand segments. The amino acid compositions of globular and outer membrane proteins have been systematically analyzed and a statistical method has been proposed for discriminating outer membrane proteins. The prediction of membrane spanning segments is mainly based ...
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It is now well recognized that the outer membranes of gram-negative bacteria serve as molecular sieves which permit the passage of small hydrophilic molecules of sizes below a given cutoff, i.e., the exclusion limit (21, 27). This sieving property, which permits uptake of small substrate molecules but excludes potentially harmful enzymes and other large hydrophilic molecules, is due to a class ...
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Twelve different porins from the gram-negative bacteria Escherichia coli, Salmonella typhimurium, Pseudomonas aeruginosa, and Yersinia pestis were reconstituted into lipid bilayer membranes. Most of the porins, except outer membrane protein P, formed large, water-filled, ion-permeable channels with a single-channel conductance between 1.5 and 6 nS in 1 M KCl. The ions used for probing the pore ...
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Proteus mirabilis, Proteus vulgaris, Morganella morganii, Providencia rettgeri, and Providencia alcalifaciens, which were once classified into the same genus, Proteus, were studied. Cefoxitin-resistant mutants from these species were isolated, and it was confirmed that the resistance was attributed to the lack of an outer membrane protein, resulting in a significant decrease in the penetration ...
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The purified outer membrane proteins of Pseudomonas aeruginosa were reconstituted with phosphatidylcholine and dicetylphosphate into membrane vesicles, and these were tested by the liposome swelling method for the diffusion of saccharides with different Mr. Proteins C (Mr, 70,000), D (Mr, 46,000), and E (Mr, 43,000) were found to confer the monosaccharide-permeable pores in the reconstituted li...
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ژورنال
عنوان ژورنال: Protein Engineering Design and Selection
سال: 1997
ISSN: 1741-0126,1741-0134
DOI: 10.1093/protein/10.5.497